Printing mechanism for accounting machines



Jan 6, 1931. CARROLL 787,721

PRINTING IIECHANISK F OR ACCOUNTING HACK-Ills Filed Aug. 1a. 1928 2 Shuts-Sheet 1 avwamtoz Jill 1931. F. M. CARROLL 1,787,721

PRINTING'MEGHANISM FOR ACCOUNTING IACHINES Filed Aug. 1a, 1928 2 Shoots-Sheet 2 um In I 34 DIM") Flea,

is: l v 9 P ramecium. e, 1931 p UNITED STATES PATENT OFFICE FRED 1L CARROLL, YQNKEBS, NEW Y OBK, ASSIGNOB TO THE TABULATING CHINE COMPANY, OI ENDICOTT, NEW YORK, A CORPORATION OF NEW JERSEY rnm'rnm imcmrslt ron Accounrmo uaciznms Application filed au m 1a, 1920. Serial mimosa.

This invention relates to printing mechanisms, in general, and more particularly to printing or duplicating devices therefor whereby impressions-may be effected on one or more record sheets.

.Heretofore, it has been proposed to effect rinting by placing in guxtapositi on and ceding simu taneously t erewith a sheet coated with carbon or other material. After strip in such a manner that all the useful life i so is ractically extracted during a single run.-

t is then a broad object of the present invention to feed a printing or duplicating medium dissimultaneously with a record sheet in the same direction to thereby effect successive printingor duplicating impressions through the same portion of the medium.

It is more specificall an object of the present inventionwhere y a contacting record sheet and an impression sheet may be fed different extents during each machine operation.

It is also an object of the present invention to provide a construction whereby an 1 additional copy may also be effected bymeans of the usual inking ribbon "and to providean arrangement whereby the tendency to feed the duplicating sheet'the same extent by -frictional contact will be obviated.

It is'also an object of the present invention to provide an arrangement whereby, more than one duplicate copy ma be rovided for and still obtain the same ne cial results as when a single copy is obtained.

These and other objects will be clear from the following description which should ,be' read in connection with the accompanying drawings, in which: i

Fig. 1 is a cross sectional view of a'printing and duplicating mechanism constructed according to the present invention. I

.13, around a roller-14 carried b Fig. 2 is a view inside elevation showing the aper strip and duplicating strip feedin% evices.

ig."3 shows an arrangement for effecting additional copies on supplemental record sheets. Y

Similar reference numerals in all the above figures are employed to designate correspondin parts thereof. i

or the purpose of illustration, the present improvements are shown in connection with the Hollerith tabulating machine and more particularly to improvements therein described in the copending application of Fred M. Carroll, Serial No. 254,936, filed February 17, 1928. It is -to be understood that the present improvements may be embodied in other forms of machines, and the present showing is to be considered as illustrative rather than restrictive.

,In the printing attachment, theprintin'g devices whereby numerals representlng items or the total of items may be printed comprises a plurality of groups of t pe bars 6, any one of which may be impel ed by hammers 7 against a laten' 8 to perform the printing function. .fDetails of the printin devices are fully disclosed in the Lake atent No. 1,379,268, dated May 24, 1921.

The paper strip 10 upon which impressions are made from the type carriers 6 by an inked ribbon '9 is drawn from a storage roller 11, thence passes around fixed rollers 12 and a pivoted arm 15', to a roller 16, also carrie by an arm 17, thence over and under a series of fixed rollers 18a and then asses around a curved plate 18 which is rigidly secured to fixed portions of the machine. uate-shaped and is concentric with respect to the shaft which supports the platen 8. The forward portion of plate 18 terminates at 19, permitting the record strip to be drawn upwardly between the platen roll 8 and the inking ribbr n 9.

The paper strip 20 upon which the impressions are made bya duplicating medium, such as the carbon strip 21 hereinshown, is drawn from a storage roller 22 and likewise passes around rollers ,13, '14 and 16 to the fixed rollers 18b and then passes downward. inside of the curved plate 18 and in immediate contact with the platen roll 8. The carbon coated strip 21 is drawn from a storage roll 23, passes around the foremost roller 18a, thence downwardly around platen roller 8, its duplicating surface being in direct contact with the record strip 20. Above the platen roll the record strips 10 and 20 pass to each side of a fixed rod or roller 24 and above the rod 24 the strips are separated more widely by a fixed plate 25. The space between the strips intermediate the roller 24 and plate 25 form a storage portion 26 for the carbon strip 21. Above the plate 25 therecord strips extend upwardl to cooperate with a pair of feeding rollers 2 It will be obvious that as an accumulation of used carbon paper increases, it is prevented from rising upwardly to cooperate with the feeding rollers 27 by the plate 25.

The printed record strips 10 and 20 may be disposed of in any suitable manner but preferably are rolled over a grid-shaped frame 28 by a plurality of rollers 29 after which time the strips are severed by a pair of knives 30 which permit the strips to assume a horizontal stacked position.

The mechanism for effecting line spacing operations to space the printed entries is fully disclosed in the copending application of F. M. Carroll, Serial No. 254,936, filed February 17, 1928, to which reference may be had for a more complete showing and description. However, in order to obtain a better understanding of the present invention this portion of the apparatus will be briefly described herein. v

The line spacing devices are under the combined control of a constantly rotatedratchet wheel 31 (Fig. 2) and a magnet 32. Pivoted by a stud 33'is a triple armed member 34, one arm of which carries a pawl 35 adapted to normally latch a pawl 36 and hold a tooth 37 thereof out of engagement with the interde'ntal s aces of the constantly rotating rachet 'w eel 31. When the latching relationship is established an extension 38 of the latching pawl 35 is adjacent an upward extension 39 of an armature 40 attracted by the magnet 32. When the magnet 32 isenergized extension 39 will strike extension 38 rocking pawl 35 to permit a spring 41 to be effective to rock pawl36 to engage the tooth 37 with v the ratchet wheel-31. This will result in rocking triple armed member 34 and through a link 42 will rock a bell'crank lever 43 and through the medium of a pawl 44 coacting with a ratchet wheel 45 attached to a shaft 46 space the last printed entry from the succeeding one. Restoring action of the parts which Power for driving the various parts just described may be obtained by a motor 51 (Fig. 1) which drives ashaft 52 by a belt connection 53. The shaft 52 drives the ratchet wheel 31 continuously throu h the train of gears and pinions denoted y numeral 54 (see Fig. 2).

Pivoted to a downward extension of lever 43 is a gravity pawl 56 engaging the teeth of a ratchet wheel 57 so that the latter is adapted to be given a counterclockwise increment of movement as an incident to each printing operation, retrograde movement of said wheel being prevented by a pawl 58. The ratchet wheel 57 has secured thereto a grooved pulley 59 which drives a larger pulley 60 by a belt connection 61. The diametrical dimensions of the pulleys 59 and 60 are so proportioned that the pulley 60 is rotated a very small amount and considerabl less than the feeding rollers 27 during each machine operation. The pulley 60 has a suitable drivin connection to the roller 23 carrying the car on sheet so that a predetermined but small amount is unrolled during each printing operation.

Referring to Fig. 1 it will be observed that as the feeding rollers 27 draw the record strips 10 and 20 upwardly the strip 20 will tend to draw the carbon strip 21- upwardly with it since it is in frictional contact therewith around the platen roll 8. However, the resistance offered by suitable frictional devices, such as the belt connection 61 permits the carbon strip to be fed only an amount governed by the amount of turning imparted to the roller 23 by the pulley 60, and as previously stated, this is considerably less than the amount of feeding movement imparted to the feeding rollers 27. This permits the car bon strip to be wholly used up, since several impressions may occur over the same portion before it is passed on.

The used-up portion is drawn upwardly by the strip 20 and passes by the roller 24 so that it accumulates in the spaced portion 26 between the strips 10 and 20 andmay be torn off when desired, roller 24 acting as a suitable tearing edge.

It will be clear that if the strip 10 was also in immediate contact with the carbon strip 21, the tendency to feed the carbon strip an amount commensurate with the record sheets would be augmented, and this could only be effectively prevented by providing additional braking or resisting devices which would probably result in placing such a strain upon the carbon sheet that it would tear or break.

ously stated, prevents the used carbon sheet frictional contact, and the only place Where the record strip 10 of original entry contacts. the carbon strip 21 is at or by the inting line and by suitably proportioning t e position of the edge 19 andthe plate 25 an desired frictional contact may e provide for, or eliminated entirely. Plate 25, as previfrom passing upwardly into cooperation wit the record strip feeding rollers 27.

. Fig. 3 indicates how the resent system may be'extended to effect ad itional carbon printed sheets'and still realize the same beneticial results as heretofore. Record strip S1, associated carbon strip 01, and record strip S2 are arranged as previously described. In immediate contact with strip S2 is a supplemental carbon stri G2 which efiects printing upon the former, t us producing a second carbon printed sheet. Strip S3 which is printed by means of the inked ribbon 9 is separated from the other sheets by an additional curved plate 181; Thus additional carbon rinted copies, as desired, may be provided or.

While I have shown and described and pointed out the fundamental novel features of the invention-as a plied to a single modifies; tion it will be un erstood that various omissions-and substitutions and changes in the form and details of the device illustrated and in itsoperation may be made by those skilled same direction but different extents an impression sheet physically contacting-with said record stri whereby successive impressions are made t rough t e same portion of sai impression sheet.-

2. In a machine of the class described, com

sion sheet a different extent w ereby successive impressigns are made through the'same portions of said impression sheet.

3. In a machineof the class described, comprising in combination with a platen roll adapted to receive a record strip and a physically contactingimpression sheet, means for rotating said platen roll to present successive but difiernt portions of the record strip toa printing line, and meansfor feeding said impression sheet during the rotation of said platen a lesser extent to permit the same portion to be used for successiveimpressions.

4. In a machine of the class described comprising in combination with means for simultaneously feeding a pair of record strips of original and duplicating entry, of means for feeding a duplicating strip therewith, and means adapted to separate said record strips to provide a space to receive an accumulation of the duplicating strip,

5. In a machine of the class described comprising in combination with means for feedinga pair of record strips of ori inal and duplicating entry, of means for eeding a duplicating sheet, and means whereby the duplicating entry receiving record strip physically contacts with the duplicating sheets only at the impression line.

6. In a machine of the class described com prising in combination with means for-feed-' inga pair of record strips, of a duplicating sheet interposed between said record strips and adapted to physically contact with said ing a record strip, of means for simultaneously imparting a like directional feed to an impression sheet physically contacting said record strip, and a reduction mechanism for feeding said record strip and impression sheet different extents. p e

8. In a machine of the class described, com,

loo

prising in combination with a platen roll constituting one element of a printing couple adapted to receive a record strip, and an impression sheet hysically contacting therewith, means for ceding the record stri and impression sheet simultaneously but die extents of movement, and means adapted to space a supplemental record strip apart from said platen roll. a

9. In a machine of the class described,com-

prising in combination with a platen roll constituting one element-of a printing couple for'efiecting impressions upon a pair of rec- 'ord strips, and means whereby said strips are spaced a art to permit an independent feed of a dup icating medium associated with and physically contacting one of said strips.

10. In a' machine of the class described comprising in combination with a platen roll constituting one element of a printing couple and adapted to determine-the printing line of a pair of record strips, and means whereby said record strips are spaced apart at each side of the printin line to provide for the independent feed 0 a duplicating sheet and a duplicating sheet receiving space.

11. In a machine of the class described comprising in combination with a platen roll constituting one element of a printing couple for. efiecting impressions from a pair of recrent 0rd strips, means whereb said strips are spaced apart at one side 0 the printing line to permit an independent feed of a duplicating sheet associated with and physically contacting one of said strips but permitting the merging of said strips at the printing line of the platen roll, and means whereby said record strips are spaced apart at the other side of the printing line to provide a duplieating sheet receiving space.

In testimony whereof I hereto afiix my signature.

FRED M. CARROLL. 

